Web content is the textual, visual or aural content that is encountered as part of the user experience on websites. It may include, among other things: text, images, sounds, videos and animations.

Content strategy refers to the planning, development, and management of content, written or in other media. wikipedia.org

Backlinks, also known as incoming links, inbound links, inlinks, and inward links, are incoming links to a website or web page. wikipedia.org

Marketing strategy is a process that can allow an organization to concentrate its limited resources on the greatest opportunities to increase sales and achieve a sustainable competitive advantage. wikipedia.org

Gambling is the wagering of money or something of material value (referred to as "the stakes") on an event with an uncertain outcome with the primary intent of winning additional money and/or material goods. Typically, the outcome of the wager is evident within a short period. wikipedia.org

Social media marketing refers to the process of gaining traffic or attention through social media sites. wikipedia.org

Google AdWords is Google's main advertising product and main source of revenue. wikipedia.org

Digital marketing is an umbrella term for the marketing of products or services using digital technologies, mainly on the Internet, but also including mobile phones, display advertising, and any other digital medium. wikipedia.org